I use R on my OpenSSI cluster with 7 CPUs, so one
could simply think of this cluster as of single computer
with 7 CPU. My own C++ maths run good in parallel
on the cluster. What is even better for me: my C++ code
has *no* any statements about parallelization.
All parallezation is done at command line. When I
start a new piece of calculation from command line,
the process is migrated to a free cluster node
automatically, it migrates even during the calculation.

The whole project is calculated nearly up to 7 time
quicker then on a single CPU. Thus, I do see the boost
clearly.

However the same approach applied to R will force me
to use batch mode instead of nice interactive mode.

Now I am writing this mail and R is still busy with
stats in usual interactive mode. Other 6 processors
are idling unfortunately. It would be really nice
to change this situation.